Region 4 Lower Sabine 2D HEC-RAS Model - SST Design Storms
This model represents the Lower Sabine watershed (HUC 12010005) within Region 4 of the Louisiana Watershed Initiative (LWI) Statewide Data and Modeling Program. It is a 2D HEC-RAS model that handles the hydraulic components of the simulations. This model was developed in conjunction with the HEC-HMS model of the watershed. It uses flow results from the HEC-HMS model in order to complete simulations. This particular version of the model contains plans for the Simplified Storm Transposition (SST) design storm methodology. It includes 7 return periods and 1 duration with 5 storm centers, resulting in 35 design storm events.
Note: Some common input files referenced by this dataset may be provided through the watershed's Supporting Files dataset that is the linked in the watershed's package.
The purpose of this model is to aid in coordination of funds, data, and resources which will help reduce flood risk through a watershed-based approach within the state of Louisiana.
Keywords
| hec-ras |
| hec |
| ras |
| hydraulic |
| model |
| LWI |
| Region 4 |
| Lower Sabine |
| EPSG:6479 |
Application date
2025-06-20Common software version
HEC-RAS version 6.4.1Authors
| Full name | |
|---|---|
| Austin Doucet, P.E. | austind@fenstermaker.com |
Common input files
| Title | Description | Location |
|---|---|---|
| Project File | Main HEC-RAS project file containing references to all model components. | LowerSabine.prj |
| Watershed Boundary File | Watershed boundary polygon shapefile defining the model domain. | \06_SupplementalFiles\RAS\Boundary\SL_Boundary_2D_ROG.shp |
| Projection File | Projection definition file used by RAS Mapper to define the model coordinate system. | \02_Projection\NAD_1983_2011_StatePlane_Louisiana_South_FIPS_1702_Ft_US.prj |
| Geometry Files | HEC-RAS geometry files defining cross sections, meshes, structures, and other hydraulic features. | LowerSabine.g01 |
| Unsteady Flow Files | HEC-RAS unsteady flow data files containing boundary conditions, initial conditions, and precipitation. | LowerSabine.u01 to LowerSabine.u42 |
| Unsteady Plan Files | HEC-RAS plan files that define the simulation settings and reference geometry and flow files. | LowerSabine.p01 to LowerSabine.p51 |
| Infiltration Layer | Infiltration data used to define infiltration parameters and soil characteristics within the model domain. | \07_MapLayers\gSSURGO_InfiltrationDC.hdf |
| Roughness Layer | Land cover data used to define Manning's roughness within the model domain. | \07_MapLayers\SupportingFiles\NLCD2019_Land_Cover.tif |
| Terrain Layer | Terrain data used to define elevations within the model domain. | \Terrain\SL_Terrain_Mod.Clone.hdf |
Associated simulations
- Region 4 Lower Sabine 2D HEC-RAS Model - SST Design Storms See more →
Containing Packages
This resource is included in the following packages:
- Region 4 Lower Sabine Watershed See more →
Resource Files
Metadata record information
| Created By | pbailey@fenstermaker.com |
| Created At | 2025-06-21t00:59:48.380973+00:00 |
| Access Level | Public |
| Is Reviewed | True |
| Owner | pbailey@fenstermaker.com |